UnderscoreIsReservedImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.UNDERSCORE_USAGE_WITHOUT_BACKTICKS) { firDiagnostic ->
        UnderscoreUsageWithoutBackticksImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }